New energy automobile battery pack constant temperature and constant pressure water chiller

Abstract

The utility model discloses a new energy automobile battery package constant temperature constant pressure water chiller, including the heat preservation box, the downside wall fixed connection of heat preservation box has the thermostat, the upside fixed connection of thermostat has the sealing cover, the right front side fixed connection of sealing cover has the liquid suction pipe, the right end outer connection of liquid suction pipe liquid inlet of external test platform adapter, the left front side of sealing cover is equipped with the radiator pipe, the right end outer connection of radiator pipe liquid outlet of external test platform adapter, the upper end fixed connection of thermostat has the apron, still include the heat -equalizing mechanism, the heat -equalizing mechanism includes rectangle cylinder, rectangle rod, connecting rod and cross board, and rectangle cylinder fixed connection is in the middle part of sealing cover, and the inside slide connection of rectangle cylinder has rectangle rod, and the lower end fixed connection of rectangle rod has connecting rod. The utility model can provide proper temperature glycol coolant according to the temperature required by test platform adapter, and the reaction speed is fast.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery pack testing technology, specifically a constant temperature and pressure chiller unit for new energy vehicle battery packs. Background Technology

[0002] The battery pack is a core component of new energy vehicles, responsible for storing and providing electrical energy. Its performance directly affects the vehicle's range, safety, and lifespan. Due to the variable operating environment of new energy vehicles, in order to ensure the battery pack has superior environmental adaptability, improve the overall vehicle safety and reliability, and guarantee the vehicle's proper operation in various complex environments, it is necessary to effectively test its performance in cold and high temperature variations.

[0003] In the prior art, the patent with authorization publication number CN214148457U discloses a constant temperature and pressure chiller unit. In actual use, although the circulation pipe can achieve rapid cooling, it cannot automatically adjust the temperature of the coolant according to the temperature required by the test platform adapter. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a constant temperature and pressure chiller unit for new energy vehicle battery packs. It provides ethylene glycol coolant at an appropriate temperature according to the temperature required by the test platform adapter, and has a fast response speed, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a constant temperature and pressure chiller unit for a new energy vehicle battery pack, including an insulation box and a controller. A constant temperature box is fixedly connected to the lower side wall of the insulation box, and a sealing cover is fixedly connected to the upper side of the constant temperature box. A liquid extraction pipe is fixedly connected to the right front side of the sealing cover, and the right end of the liquid extraction pipe is externally connected to the liquid inlet of an external test platform adapter. A heat dissipation pipe is provided on the left front side of the sealing cover, and the right end of the heat dissipation pipe is externally connected to the liquid outlet of an external test platform adapter. A cover plate is fixedly connected to the upper end of the constant temperature box, and a heat equalization mechanism is also included. The heat equalization mechanism includes a rectangular cylinder, a rectangular rod, a connecting rod, and a cross plate. The rectangular cylinder is fixedly connected to the middle of the sealing cover. The rectangular rod is slidably connected inside the rectangular cylinder. The lower end of the rectangular rod is fixedly connected to the connecting rod. The lower side of the outer arc surface of the connecting rod is fixedly connected to a uniformly distributed cross plate. Both cross plates are located inside the constant temperature chamber.

[0006] Furthermore, the heat dissipation mechanism also includes a drive chamber, a guide rail, a slider, and a transverse slide rail. The transverse slide rail is fixedly connected to the upper end of the rectangular rod, and the upper end of the sealing cover is fixedly connected to the top mounting bracket. The upper surface of the top mounting bracket has a drive chamber. The front and rear side walls of the drive chamber are respectively provided with guide rails. The transverse slide rail is slidably connected to the inside of each slider. The two sliders are fixedly connected to the outer surface of one transverse slide rail to realize the transmission function.

[0007] Furthermore, the heat equalization mechanism also includes a drive assembly; the drive assembly includes a motor, a turntable, and a sliding pin. The turntable is rotatably connected to the middle of the left side wall and the middle of the right side wall of the drive chamber via a rotating shaft. A sliding pin is fixedly connected to the rear side between the two turntables. The outer arc surface of the sliding pin is slidably connected to the interior of the transverse slide rail. A motor is fixedly connected to the right side of the top mounting bracket. The output shaft of the motor is fixedly connected to the right end of the rotating shaft on the right side. The input end of the motor is electrically connected to the output end of the controller to provide power for heat equalization.

[0008] Furthermore, a heat dissipation box is fixedly connected to the left side of the heat insulation box, and the left side of the heat dissipation pipe extends into the interior of the heat dissipation box. The outer arc surface of the heat dissipation pipe is fixedly connected with evenly distributed heat dissipation fins, all of which are located inside the heat dissipation box. The front and rear sides of the heat dissipation box are respectively provided with evenly distributed cooling fans, and the input end of the cooling fans is electrically connected to the output end of the controller to realize the heat dissipation function.

[0009] Furthermore, a circulation pump is connected in series on the upper side of the liquid extraction pipe, a water pressure gauge is connected in series on the upper right side of the liquid extraction pipe, an electronic level gauge is provided on the upper surface of the sealing cover on the front left side, the measuring end of the electronic level gauge extends into the interior of the constant temperature chamber, an inlet is provided on the upper surface of the sealing cover on the left side, the input end of the circulation pump is electrically connected to the output end of the controller, and the water pressure gauge and the electronic level gauge are both bidirectionally electrically connected to the controller to provide power for the circulation of refrigerant.

[0010] Furthermore, the inner wall of the constant temperature chamber is provided with uniformly distributed heating wires, and the side wall of the constant temperature chamber is provided with uniformly distributed electronic thermometers. The measuring ends of the electronic thermometers all extend into the interior of the constant temperature chamber. The input ends of the heating wires are electrically connected to the output ends of the controller, and the electronic thermometers are bidirectionally electrically connected to the controller to realize the function of heating the temperature of the refrigerant.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The crank-connecting rod structure drives the two cross plates on the connecting rod to move up and down, so that the low-temperature liquid and the high-temperature liquid are fully mixed. When the test platform adapter needs to be heated, the chiller unit supplies high-temperature coolant to the test platform adapter to realize the function of measuring high-temperature test batteries. According to the temperature required by the test platform adapter, the appropriate temperature of ethylene glycol coolant is provided, and the reaction speed is fast. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention in an explosion. Figure 3 This is a schematic diagram of the heat dissipation mechanism of this utility model.

[0013] In the diagram: 1. Insulation box, 2. Heat dissipation box, 3. Cover plate, 4. Constant temperature box, 5. Sealing cover, 6. Top mounting bracket, 7. Heat dissipation mechanism, 71. Rectangular cylinder, 72. Rectangular rod, 73. Connecting rod, 74. Cross plate, 75. Drive chamber, 76. Guide rail, 77. Slider, 78. Horizontal slide rail, 79. Drive assembly, 791. Motor, 792. Turntable, 793. Sliding pin, 8. Heat pipe, 9. Heat sink, 10. Liquid extraction pipe, 11. Circulation pump, 12. Water pressure gauge, 13. Electronic level gauge, 14. Liquid inlet, 15. Cooling fan, 16. Heating wire, 17. Electronic thermometer, 18. Controller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 This embodiment provides a technical solution: a constant temperature and pressure chiller unit for a new energy vehicle battery pack, including an insulation box 1 and a controller 18. A constant temperature box 4 is fixedly connected to the lower side wall of the insulation box 1, and a sealing cover 5 is fixedly connected to the upper side of the constant temperature box 4. A liquid extraction pipe 10 is fixedly connected to the right front side of the sealing cover 5, and the right end of the liquid extraction pipe 10 is externally connected to the liquid inlet of an external test platform adapter. A heat dissipation pipe 8 is provided on the left front side of the sealing cover 5, and the right end of the heat dissipation pipe 8 is externally connected to the liquid outlet of the external test platform adapter. A cover plate is fixedly connected to the upper end of the constant temperature box 4. 3; A heat sink 2 is fixedly connected to the left side of the heat sink 1. The left side of the heat sink 8 extends into the interior of the heat sink 2. The outer arc surface of the heat sink 8 is fixedly connected to a uniformly distributed heat sink 9. The heat sink 9 are all located inside the heat sink 2. The front and rear sides of the heat sink 2 are respectively provided with uniformly distributed cooling fans 15. The input end of the cooling fan 15 is electrically connected to the output end of the controller 18. When the water level reaches a specified amount, the capacity of the ethylene glycol coolant in the constant temperature chamber 4 can be adjusted according to the operating temperature required by the external test platform adapter during testing.

[0016] A circulation pump 11 is connected in series on the upper side of the suction pipe 10, and a water pressure gauge 12 is connected in series on the upper right side of the suction pipe 10 (the water pressure gauge 12 is an electronic water pressure gauge, and the "pressure sensing" of the water pressure gauge 12 relies on its built-in piezoresistive pressure sensor. The core of the piezoresistive sensor is a "silicon diaphragm", on which four symmetrical resistors are integrated (forming a "Wheatstone bridge" circuit). When water pressure acts on the silicon diaphragm, the diaphragm undergoes a slight deformation, causing the resistance values ​​of the four resistors to differ, which in turn causes the output voltage of the Wheatstone bridge to change. Its internal resistance value changes proportionally with the pressure. The greater the pressure, the more obvious the change in resistance value; the smaller the pressure, the weaker the change in resistance value. The electrical signal output by the pressure sensor is fed back to the controller 18 to realize the function of real-time measurement of water pressure information). An electronic level gauge 13 is provided on the upper front left side of the sealing cover 5 (the microwave oscillator inside the electronic level gauge 13 generates continuous Low-power microwave pulses are directionally transmitted to the surface of the liquid via an antenna system. The microwave pulses travel at the speed of light in the space between the radar antenna and the liquid surface. When the pulse reaches the liquid surface, due to the difference in dielectric constant between the medium and air (the dielectric constant of the liquid is much greater than that of air), most of the microwave energy is reflected. The reflected wave returns along the original path and is captured by the receiving antenna of the level gauge (some models share a single antenna for transmission and reception, and the signal is separated by a "transmit-receive switch"). The received reflected signal is a weak electrical signal, which needs to be amplified by a signal amplifier and then analyzed by the controller 18 to obtain the liquid level height and liquid quantity information. The measuring end of the electronic level gauge 13 extends into the interior of the constant temperature chamber 4. The upper surface of the sealing cover 5 has a liquid inlet 14 on the left side. The input end of the circulating pump 11 is electrically connected to the output end of the controller 18. The water pressure gauge 12 and the electronic level gauge 13 are both bidirectionally electrically connected to the controller 18.

[0017] The inner wall of the constant temperature chamber 4 is equipped with uniformly distributed heating wires 16 (the heating wires 16 are iron-chromium-aluminum heating wires; when current passes through the iron-chromium-aluminum heating wires, the current's thermal effect (Joule effect), that is, when current passes through a conductor with a certain resistance, electrical energy is converted into heat energy and released, thereby achieving the heating function), and the side wall of the constant temperature chamber 4 is equipped with uniformly distributed electronic thermometers 17. The measuring ends of the electronic thermometers 17 all extend into the interior of the constant temperature chamber 4 (the electronic thermometers 17 are thermocouple sensors; a complete thermocouple sensor consists of three parts: thermoelectrodes, insulating material, and protective sheath. The thermoelectrodes are the core components, and the insulating material isolates the two thermoelectrodes to prevent short circuits and protect them). The sheath protects the thermoelectrode from the measured environment. Its core principle is to use a closed loop composed of two different metals (thermoelectrodes) to connect the two ends of two different conductors A and B respectively to form a closed loop. When there is a temperature difference (ΔT=T1-T0) between the two connection points (called the "hot end" and the "cold end"), a DC potential related to the temperature difference—the Seebeck potential (E)—will be generated in the loop. After the DC potential is fed back to the controller 18, the controller 18 analyzes the potential and obtains the temperature information. The input end of the heating wire 16 is electrically connected to the output end of the controller 18, and the electronic thermometer 17 is bidirectionally electrically connected to the controller 18.

[0018] The system also includes a heat equalization mechanism 7. The heat equalization mechanism 7 includes a rectangular cylinder 71, a rectangular rod 72, a connecting rod 73, and a cross plate 74. The rectangular cylinder 71 is fixedly connected to the middle of the sealing cover 5. The rectangular rod 72 is slidably connected inside the rectangular cylinder 71. The lower end of the rectangular rod 72 is fixedly connected to the connecting rod 73. The lower side of the outer arc surface of the connecting rod 73 is fixedly connected to a uniformly distributed cross plate 74. Both cross plates 74 are located inside the constant temperature chamber 4. The heat equalization mechanism 7 also includes a drive chamber 75, a guide rail 76, a slider 77, and a transverse slide rail 78. The transverse slide rail 78 is fixedly connected to the upper end of the rectangular rod 72. The upper end of the sealing cover 5 is fixedly connected to the top mounting bracket 6. The upper surface of the top mounting bracket 6 has a drive chamber 75. The front and rear side walls of the drive chamber 75 have guide rails 76 respectively. The transverse slide rail 78 has sliders 77 slidably connected inside each slider. The two sliders 77 are fixedly connected to the outer surface of one transverse slide rail 78.

[0019] The heat dissipation mechanism 7 also includes a drive assembly 79; the drive assembly 79 includes a motor 791, a turntable 792 and a sliding pin 793. The turntable 792 is rotatably connected to the middle of the left side wall and the middle of the right side wall of the drive chamber 75 via a rotating shaft. A sliding pin 793 is fixedly connected to the rear side between the two turntables 792. The outer arc surface of the sliding pin 793 is slidably connected to the interior of the transverse slide rail 78. The motor 791 is fixedly connected to the right side of the top mounting bracket 6. The output shaft of the motor 791 is fixedly connected to the right end of the rotating shaft on the right side. The input end of the motor 791 is electrically connected to the output end of the controller 18.

[0020] The working principle of this utility model is as follows: When the chiller unit is needed, ethylene glycol coolant can be poured into the thermostatic chamber 4 through the inlet 14. At this time, the controller 18 can be adjusted to operate the electronic level gauge 13 to measure the amount of ethylene glycol coolant inside the thermostatic chamber 4 in real time. If the temperature required by the external test platform adapter is determined, the controller 18 can be adjusted to operate the heating wire 16. The heating wire 16 is energized to heat the coolant in the thermostatic chamber 4, so that the temperature of the coolant is heated to the temperature required by the test platform adapter. During this period, the electronic thermometer 17 operates and collects the temperature information of various locations inside the thermostatic chamber 4. At this time, the hot liquid can participate in the above circulation operation, and the ethylene glycol coolant delivered to the test platform adapter can perform the heating operation. When the test platform adapter requires a lower temperature ethylene glycol coolant, the heating wire 16 stops operating, which allows the controller 18 to be activated, the cooling fan 15 to operate, and the heat pipe 8 to circulate the higher temperature ethylene glycol coolant. At the same time, the cooling fan 15 operates, and the ethylene glycol coolant flowing through the heat pipe 8 dissipates its own heat to the heat sink 9. Simultaneously, the cooling fan 15 draws air from the rear and exhausts air from the front to form an airflow, which carries away the heat in the ethylene glycol coolant and circulates it into the interior of the constant temperature chamber 4, lowering the temperature of the ethylene glycol coolant in the constant temperature chamber 4 and circulating it into the test platform adapter. At this time, the circulated water needs to be reheated. When the coolant participates in the circulation, the controller 18 can be adjusted and the water pressure gauge 12 can be operated. The water pressure gauge 12 measures the water pressure in real time to keep the water pressure between 3.0 bar and 4.0 bar. If the water pressure is lower than 3.0 bar, the operating power of the circulation pump 11 can be increased. If the water pressure is higher than 4.0 bar, the operating power of the circulation pump 11 can be reduced to ensure constant water pressure. When the coolant flows into the left side of the constant temperature chamber 4, the controller 18 can be adjusted to start the motor 791. The output shaft of the motor 791 rotates, which in turn drives the turntable 792 to rotate, which in turn drives the sliding pin 793 to rotate around the central axis of the output shaft of the motor 791. The horizontal slide rail 78 and the sliding pin 793 maintain a sliding connection. When the sliding pin 793 moves to the uppermost side, it will push the horizontal slide rail 78 upward, forcing the rectangular rod 72 to move upward. When the sliding pin 793 moves to the lowermost side, it will push the horizontal slide rail 78 downward, forcing the rectangular rod 72 to move downward. As the sliding pin 793 rotates continuously, the connecting rod 73 drives the two cross plates 74 to move up and down continuously, thereby continuously mixing the coolant up and down, so that the heated and unheated coolant are mixed, ensuring that the temperature of the extracted coolant is constant. When the coolant is circulating, the controller 18 can be adjusted to operate the water pressure gauge 12. The water pressure gauge 12 measures the water pressure in real time to keep the water pressure between 3.0 bar and 4.0 bar. If the water pressure is lower than 3.0 bar, the operating power of the circulation pump 11 can be increased. If the water pressure is higher than 4.0 bar, the operating power of the circulation pump 11 can be reduced to ensure constant water pressure.

[0021] It is worth noting that the controller 18 disclosed in the above embodiments uses a single-chip microcomputer, specifically the S7-200 model. The motor 791, circulation pump 11, water pressure gauge 12, electronic level gauge 13, cooling fan 15, heating wire 16, and electronic thermometer 17 can be freely configured according to the actual application scenario. It is recommended that the motor 791 be a 57 series stepper motor, the circulation pump 11 be a DC30 series brushless DC hot water circulation pump, and the water pressure gauge 12 be a YS80BF type. For the electronic water pressure gauge 13, it is recommended to use the XYRD902 radar level gauge; for the cooling fan 15, it is recommended to use the F2E-320 series cooling fan; for the heating wire 16, it is recommended to use the iron-chromium-aluminum heating wire; and for the electronic thermometer 17, it is recommended to use the K-type thermocouple sensor. The operation of the motor 791, circulating pump 11, water pressure gauge 12, electronic level gauge 13, cooling fan 15, heating wire 16, and electronic thermometer 17 controlled by the microcontroller or PLC controller shall all adopt the methods commonly used in the existing technology.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A constant temperature and pressure chiller unit for new energy vehicle battery packs, characterized in that: The device includes an insulated box (1) and a controller (18). A constant temperature box (4) is fixedly connected to the lower side wall of the insulated box (1). A sealing cover (5) is fixedly connected to the upper side of the constant temperature box (4). A liquid extraction pipe (10) is fixedly connected to the right front side of the sealing cover (5). The right end of the liquid extraction pipe (10) is connected to the liquid inlet of an external test platform adapter. A heat dissipation pipe (8) is provided on the left front side of the sealing cover (5). The right end of the heat dissipation pipe (8) is connected to the liquid outlet of an external test platform adapter. A cover plate (3) is fixedly connected to the upper end of the constant temperature box (4). It also includes a heat equalization mechanism (7); The heat equalization mechanism (7) includes a rectangular cylinder (71), a rectangular rod (72), a connecting rod (73), and a cross plate (74). The rectangular cylinder (71) is fixedly connected to the middle of the sealing cover (5). The rectangular rod (72) is slidably connected inside the rectangular cylinder (71). The lower end of the rectangular rod (72) is fixedly connected to the connecting rod (73). The lower side of the outer arc surface of the connecting rod (73) is fixedly connected to a uniformly distributed cross plate (74). Both cross plates (74) are located inside the constant temperature chamber (4).

2. The constant temperature and pressure chiller unit for new energy vehicle battery packs according to claim 1, characterized in that: The heat equalization mechanism (7) also includes a drive chamber (75), a guide rail (76), a slider (77), and a transverse slide rail (78). The transverse slide rail (78) is fixedly connected to the upper end of the rectangular rod (72). The upper end of the sealing cover (5) is fixedly connected to the top mounting bracket (6). The upper surface of the top mounting bracket (6) is provided with a drive chamber (75). The front and rear side walls of the drive chamber (75) are respectively provided with guide rails (76). The transverse slide rail (78) is slidably connected to the inside of the slider (77). The two sliders (77) are fixedly connected to the outer surface of the transverse slide rail (78).

3. A constant temperature and pressure chiller unit for new energy vehicle battery packs according to claim 2, characterized in that: The heat equalization mechanism (7) also includes a drive assembly (79); the drive assembly (79) includes a motor (791), a turntable (792) and a sliding pin (793). The turntable (792) is rotatably connected to the middle of the left side wall and the middle of the right side wall of the drive chamber (75) through a rotating shaft. A sliding pin (793) is fixedly connected to the rear side between the two turntables (792). The outer arc surface of the sliding pin (793) is slidably connected to the interior of the transverse slide rail (78). A motor (791) is fixedly connected to the right side of the top mounting bracket (6). The output shaft of the motor (791) is fixedly connected to the right end of the rotating shaft on the right side. The input end of the motor (791) is electrically connected to the output end of the controller (18).

4. A constant temperature and pressure chiller unit for new energy vehicle battery packs according to claim 1, characterized in that: The heat dissipation box (2) is fixedly connected to the left side of the heat dissipation box (1). The heat dissipation pipe (8) extends to the inside of the heat dissipation box (2) on the left side. The outer arc surface of the heat dissipation pipe (8) is fixedly connected to the heat dissipation fins (9) that are evenly distributed. The heat dissipation fins (9) are all located inside the heat dissipation box (2). The front and rear sides of the heat dissipation box (2) are respectively provided with evenly distributed cooling fans (15). The input end of the cooling fan (15) is electrically connected to the output end of the controller (18).

5. A constant temperature and pressure chiller unit for new energy vehicle battery packs according to claim 1, characterized in that: A circulation pump (11) is connected in series on the upper side of the pumping pipe (10), a water pressure gauge (12) is connected in series on the upper right side of the pumping pipe (10), an electronic level gauge (13) is provided on the upper front left side of the sealing cover (5), the measuring end of the electronic level gauge (13) extends into the interior of the constant temperature chamber (4), an inlet (14) is provided on the upper left side of the sealing cover (5), the input end of the circulation pump (11) is electrically connected to the output end of the controller (18), and the water pressure gauge (12) and the electronic level gauge (13) are both bidirectionally electrically connected to the controller (18).

6. A constant temperature and pressure chiller unit for new energy vehicle battery packs according to claim 1, characterized in that: The inner wall of the constant temperature chamber (4) is provided with uniformly distributed heating wires (16), and the side wall of the constant temperature chamber (4) is provided with uniformly distributed electronic thermometers (17). The measuring ends of the electronic thermometers (17) extend into the interior of the constant temperature chamber (4). The input ends of the heating wires (16) are electrically connected to the output ends of the controller (18). The electronic thermometers (17) and the controller (18) are bidirectionally electrically connected.

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